5 files changed, 39 insertions, 8 deletions
diff --git a/src/DTS/Bookmark.php b/src/DTS/Bookmark.php
index 543a552..da9afa9 100644
--- a/src/DTS/Bookmark.php
+++ b/src/DTS/Bookmark.php
@@ -8,11 +8,11 @@ class Bookmark
 {
     public string $id;
 
-    public string $url;
+    public string $url = '';
 
-    public string $title;
+    public string $title = '';
 
-    public string $tag;
+    public string $tag = '';
 
     public string $addedAt;
 
diff --git a/src/DTS/Old.php b/src/DTS/Old.php
new file mode 100644
index 0000000..8545f8d
--- /dev/null
+++ b/src/DTS/Old.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DTS;
+
+class Old
+{
+    const FIELDS = [
+        'url',
+        'title',
+        'tag',
+    ];
+
+    private array $old = [];
+
+    function __construct(array $request = [])
+    {
+        foreach(self::FIELDS as $field) {
+            if (array_key_exists($field, $request)) {
+                $this->old[$field] = $request[$field];
+            }
+        }
+    }
+
+    public function get(string $key, mixed $default = null): mixed
+    {
+        return $this->old[$key] ?? $default;
+    }
+}
diff --git a/src/DTS/Session.php b/src/DTS/Session.php
index e5da42f..445f31c 100644
--- a/src/DTS/Session.php
+++ b/src/DTS/Session.php
@@ -8,7 +8,7 @@ class Session
 {
     private static ?self $instance = null;
 
-    private array $session;
+    private array $session = [];
 
     public static function getInstance()
     {
diff --git a/src/DTS/Validated.php b/src/DTS/Validated.php
index 5df8af7..86c6f64 100644
--- a/src/DTS/Validated.php
+++ b/src/DTS/Validated.php
@@ -6,9 +6,9 @@ namespace DTS;
 
 class Validated
 {
-    public ?string $url;
+    public string $url = '';
 
-    public ?string $title;
+    public string $title = '';
 
-    public ?string $tag;
+    public string $tag = '';
 }
diff --git a/src/DTS/Validator.php b/src/DTS/Validator.php
index 7629e3b..472b38f 100644
--- a/src/DTS/Validator.php
+++ b/src/DTS/Validator.php
@@ -13,7 +13,8 @@ class Validator
 
     public Validated $validated;
 
-    function __construct(array $request) {
+    function __construct(array $request) 
+    {
         $this->errors = new Errors();
 
         $this->validated = new Validated();